Journalist who exposed influential seer’s ‘misdeeds’ gets threat calls

The current physical distancing guidelines provided by the World Health Organisation (WHO) and by the US Centers for Disease Control and Prevention (CDC) may not be adequate to curb the coronavirus spread, according to a research which says the gas cloud from a cough or sneeze may help virus particles travel up to 8 metres. The research, published in the Journal of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.

Study author, MIT associate professor Lydia Bourouiba, warned that droplets of all sizes can travel 23 to 27 feet, or 7-8 metres, carrying the pathogen.

According to Bourouiba, the current guidelines are based on "arbitrary" assumptions of droplet size, "overly simplified", and "may limit the effectiveness of the proposed interventions" against the deadly pandemic.

 She explained that the old guidelines assume droplets to be one of two categories, small or large, taking short-range semi-ballistic trajectories when a person exhales, coughs, or sneezes.

However based on more recent discoveries, the MIT scientist said, sneezes and coughs are made of a puff cloud that carries ambient air, transporting within it clusters of droplets of a wide range of sizes.

Bourouiba warned that this puff cloud, with ambient air entrapped in it, can offer the droplets moisture and warmth that can prevent it from evaporation in the outer environment.

"The locally moist and warm atmosphere within the turbulent gas cloud allows the contained droplets to evade evaporation for much longer than occurs with isolated droplets," she said.

"Under these conditions, the lifetime of a droplet could be considerably extended by a factor of up to 1000, from a fraction of a second to minutes," the researcher explained in the study.

The MIT scientist, who has researched the dynamics of coughs and sneezes for years, added that these droplets settle along the trajectory of a cough or sneeze contaminating surfaces, with their residues staying suspended in the air for hours.

"Even when maximum containment policies were enforced, the rapid international spread of COVID-19 suggests that using arbitrary droplet size cutoffs may not accurately reflect what actually occurs with respiratory emissions, possibly contributing to the ineffectiveness of some procedures used to limit the spread of respiratory disease," Bourouiba wrote in the study

Bengaluru, Feb 27: Union Minister of State for External Affairs V Muraleedharan on Wednesday said the Union Government will take up the issue of establishing a US consulate in Bengaluru during bilateral talks with the US officials in the future.

Speaking at a seminar on Videsh Sampark here, Mr Muraleedharan said after Delhi and Mumbai, a large number of visa applications come from Bengaluru. “We will take up the issue of establishing a US consulate in Bengaluru during bilateral talks,” he said.

Earlier, the chief secretary of Karnataka TM Vijay Bhaskar urged the centre to consider the state government’s demand of setting up a US Consulate in Bengaluru. At the moment visa applicants have to travel to Chennai for the purpose.

Bengaluru, May 22: Karnataka government on Thursday announced that weddings scheduled for May 24 and May 31 are exempted from complete lockdown on Sundays.

As per an earlier advisory issued by the State government with regard to weddings, not more than 50 guests shall be allowed and the consumption of liquor on the occasion will be prohibited.

According to the advisory, sanitisers should be provided at the entry and other appropriate places at the venue. Also, thermal screening of all persons shall be conducted at the entry of the venue. The scanner should be held 3-15 cms away from a person's forehead.

Apart from this, the venue shall be "clean and hygienic," and a "nodal person shall be identified for overseeing the arrangements and coordination at the venue."

Also, a list of attendees with contact details has to be maintained and all guests should have downloaded Aarogya Setu app.